hartman



c. H. HARTMAN.

SHEET CUTTER.

APPLICAHON mu) MAtL ZBflBIH.

1,306,009. Puhrntodlumit), 1919.

'INVEN TO K- GIL/Z746 cm H. nenmmesmcor znonnno, OHIO.

snnnmscmmim.

Specificatiiomof; LettersfPatent.

Patented June M9, 1919.

Application filed Marbh228l19l8. 86.1%! No. 225,261.

To all whom' z'tmay czm'cmm Be itiknownz thatiLLGA'RL H. HARTMA\N,H3.citizen ofttheUnited St-ates, and a resident of Toledo; in the rcountyofLucas andr-State of Ohio, E'have invented a certain new wand usefulSheet Gutter pan-d l 'do hereby declare the following to beaifullyclear, and exact description of the invention, such as *wlillenable otherss skilled thwart to which it-lappertains to'lmakearfduusethe same, reference being hadto the: accompanying drawings, and to the"charactersoof "reference :marked thereon, which form a part of thisspecification.

My invention relates to me'chanism for cutting material in the -form ofsheets, such as paper, fabric ornarticles formed therefrom which maypartake ofsheet'form. The object of the invention is to provide acutterthat will perform the "cutting operation With a quickCHttlIIglmOVBIIIBITt. 'The-invention particularly is ofkva'luein'itsiuse in connection With the cutting: of sheet Imaterial,

where the material isunoVed-over apla'ne in order that certainoperations may! be performed on it according to theoharacte'r and thefunctions of the machine,and wherein the sheet material isil to be cutinto certain lengths or at definite; points.

In the cutting operationofmachine of the general type described,the'cutters are timed cutting blade.

mechanism containing the inventlon with according to the speedorumovement of the .sheet material, and so that the blade or othercuttin instrument w'ilLmove-withithe sheet material while itisgperforming its operation. By my inventionis PIOVIdGd a means wherebythe sheet materialzmay beeut at various lengths without the necessarytiming of the movement of the cutting blade with reference to themovement of the sheet.

The invention may be'contained in various forms of constructionsp andsuch constructions maybe used inmachines that accom plish a greatvariety ofresults. I have se-" ected a construction containing thelnvention as illustrative of such constructions, and

shall describe .it hereinafter. The construction selected is illustratedin'the accompanying drawings.

Figure 1 of the drawings is a sectional view of'a rotative member whichoperates a Fig. 2 is a1 side view of the partsI illust'rated as brokenaway render .ithatiother parts may be shown. Fig. 3iis an view of themechanism.

..-l-is a frame of a machine (of any (type \wvh'i'ch' operates upon thesheet material. llit has a bed plate 2 on which thesheet material --isplaced and over which it is moved byzany suitable means at a requisitespeed ascending \to" the character of the machine. islhoiuezandbelow thebed 2, are located theshafts :3I-and 4 to which are connected the gearwheels 5 and 6. The shafts 3 and 4 may receive their driving power fromany suitable sourceand through any suitable means. desired, the .gearwheel 5 may be driven b :a pinion which will in turn drive therotating'elements connected therewith.

A pair of disks or Wheels 7 are keyed to the shaft 3. Diametricallydisposed sockets 8 and 9 are formed in the edges or-sides of the Wheelsor disks 7. Also openings are formed in the shaft 3 and rods 10 extendthrough the openings in the shaft 3 and into the sockets 8 and 9. Therods 10 areprovided with heads 11 and across bar .12 extends throughslots formed in the heads 11 of the rods 10.. The cross bar 12may-'besecured in the heads 11 by suitable pins '13.

, The blade 14, which is operated tocut the sheet material, is secured1n the cross':bar.12.

The blade 14 is forced down withaquick snap-like movement by means ofthe cam members or fingers 15-, and the coacting rollers 16 located inthe brackets 17. The cam members 15 are pivotally connected to thewheels or disks 7 at a point slightly in advance of the sockets 8.Springs .18 are secured to the edges or sides of the wheels or disks 7and operate to-hold the cam members 15 against the centrifugal actiondue to rotation of the wheels 7.

The cam members 15 operate to move the rods 10 downward when the endsof-the cam members 15 pass under the rollers 16, the movement bein "aquick movement and, being performe while the short cam surfaces 19 passbeneath the rollers 16. ,lBy this means, the blade 14 will pass throu hthe sheet material Without holdin the e ge of the sheet material back ifthe s eetzmaterial is moving faster than the blade, orwithout draggingthe sheet material if the blade is moving faster than the sheetmaterial.

The return movement of the blade 14 is accomplished by means of thesprings located in the sockets 8 and which surround the ends of the rods10. The springs 20 bein compression springs operate between the ottom ofthe sockets 8 and a suitable washer or flange that may be placed orformed on the ends of the rods 10. For purposes of adjustment, the endsof the rods 10 are provided with bolts 21 that are threaded into theends of the rods 10, and the cam members or fingers 15 are pressedagalnst the heads of the bolts 21 by the operat on of the springs 18 andalso by the OPBILtlOIl Of the rollers 16. Each bolt 21 may be locked inits adjusted position by means of the nut 22. The nut 22 also operatesas a means for holding the spring 20 in position and acts as a flangeagainst which the sprlng presses to cause the return movement of theblade when the cam members have passed the rollers 16. I

The blade 14 may be made to coact with a second cutting member, such asthe bar 23. The bar 23 is rovided with a channel 24 into which the blade14 may be moved during its cutting operation. The bar 23 is locatedbelow the sheet material and is supportedon the arms 25 that are keyedto the shaft 4. The shaft 4 being connected to the gear wheel 5, and thegear wheels 5 and 6 being of the same size, the bar 23 and the blade 14will move together, that is, the

channel 24 may be made to register at regular intervals of time in orderthat the blade may enter the channel to cut the sheet ma terlal. Inorder that the blade 14 may register with considerable accuracy ,withthe channel 24, the finer adjustments may be obtained through'theadjustment of the gear 6 on the shaft 3 which maybe clamped and securedsheet material that is passed between the by the bolts 35 thatextendthrough slots 26 l formed inthe gear wheel 6 in a manner wellknown in the art. Also the brackets 17 that support the rollers 16 thatoperate the cam members 15 may be-ad usted on the frame 1 cam membersthat operate the blade, the followin ed e of the channel bar 23 maycoact witht e b ade 14 to shear the paper or other rotating blade andthe rotatin channel bar. When the blade cuts the s set material, thesevered edge of the sheet material may be turned slightly downward owingto the downward movement of the blade'in the per- 'formance ofthecuttinn operation. To prelventthe; turned edge of'the sheet materialfrom' .bel-n'gilcau ht in the channel 24, particularly w cut e sheetmaterial is moving faster than thebar 23, the leading edge of thechannel 24 is cut down and rounded as at 29, in order that the edge ofthe sheet may be guided upward to about the portion of the bed locatedin advance of the slot in the bed through which the plate 14 operates.

I claim: 7

1. In a sheet cutter, a pair of wheels, rods extending through the axisof the wheels, a blade supported on the rods, cam members pivotallysupported on the wheels and -ex- 'tending over and operating forming acoacting cutting member, the

other side of the channel having a beveled edge.

4. In a sheet cutter, a blade, members for operating the blade, acoacting shearing cutting bar having a channel, one edge of the channelforming a coacting cutting member, the other side of the channelhaving aconcave beveled edge.

5. In a sheet cutter, a pair of disks, a

shaft for supporting and rotating the disks, 5

a pair of rods extending through the shaft and disks, a blade connectedto the ends of the rods, members pivoted in the periphery.

of the disks and extending over the endsof rods, a pair of rollers foroperating on the I pivoted members. I a

6. In a sheet cutter, a blade, a shaft for rotating the blade, a memberpivotally connected to th shaft for operating the blade, rollers .foroperating on the pivoted members as the pivoted members'pass-therollers.

7. In a sheet cutter, a blade, a shaft for rotating the blade, a channelbar, a shaft for rotating the channel bar, the channel bar having ashearing edge coacting with the blade on one side of the channel and abeveled edge on the other side of the channel,

means for operating the blade when the channeland the'blade register.-

8. In a sheet cutter, a bed plate, a pair of disks located above the bedplate, a shaft for rotating the disks, rods extending through the disksand shafts; membersvpivoted near the periphery of the disk and extendingover the end of the rods, a blade con?" nected to the ends of the rods,achannel bar located below the bed, a shaft for rotating.

the channel bar, the channel barhaving a cuttm eglge coacting with theblade and a bevele sie 9. In a eet cutter, a bed plate, a pair'of diskslocated above the bed plate, a shaft 1,306,009 1 Y i i Q for rotatingthe disks, rods extending edge of the channel forming a coactingcutthroughthe disks and shafts,rmembers pivotting edge, the leading edgeof the channel ed near the periphery of the disk and exbeing beveled. 10tending over the ends of the rods, a blade In testimony whereof I havehereunto '5 connected to the'leadin ends of the rods, I signed my nameto this specification.

a channel bar located be OW the bed, a shaft for rotating thechannel-bar, the following I CARL H. i E I T.

